We have only a single TIU and used the "ALL" option when creating TIU tracks.
Actually, you did not create any TIU Tracks in that way because that doesn't create TIU Tracks, rather, it's a method of controlling mulltipler TIU Tracks using a single throttle and functions.
You must create all of your TIU Tracks as I previously described, before using the "ALL TIU Tracks" method of controlling them.